Bicycle Archive · Specification report

1998 Electra Bomber 21

Velopedia Archive ID 77210

Overview

Model year	1998
Brand	Electra
Model	Bomber 21
Bicycle type	Mountain bike, front suspension
Archive ID	77210
Original MSRP	$550.00
Colors	Electric red
Sizes	18.5"

Frameset

Frame construction	TIG-welded
Frame material	4130 chromoly main triangle/hi-tensile steel rear stays
Fork	RST 280
Fork material	Aluminum/chromoly, triple-clamp crown
Rear shock	N/A

Drivetrain

Component group	Shimano Alivio/AceraX
Shifters	Shimano STX RapidFire SL
Front derailleur	Shimano AceraX top-swing, top-pull
Rear derailleur	Shimano Alivio
Crankset	Shimano Alivio, 24/34/42 teeth
Bottom bracket	Shimano BB-LP26
BB shell width	68mm English
Rear cogs	7-speed, 11 - 30 teeth
Chain	1/2 x 3/32"
Pedals	Wellgo resin/aluminum

Brakes

Brakes	Tektro 823 linear-pull brakes, Tektro RBP-375A levers

Cockpit & contact points

Headset	1" threadless YST
Handlebar	Kalloy alloy riser
Handlebar extensions	N/A
Stem	Kalloy aluminum
Saddle	EBC Performance
Seatpost	Kalloy aluminum micro-adjust, 26.8mm diameter

Wheels & tires

Hubs	Shimano AceraX
Rims	EBC TA-8 aluminum, 36-hole
Spokes	Stainless steel, 2.0mm straight gauge
Spoke nipples	Brass nipples
Front tire	26 x 2.10" EBC All Terrain
Wheel size	26" wheels

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 30, 2026.